Organic light-emitting display panel and display apparatus

This application is a continuation of International Application No. PCT/CN2021/122585, filed on Oct. 8, 2021, which claims priority to Chinese Patent Application No. 202011380685.9, filed on Nov. 30, 2020. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties.

This application relates to the field of display technologies, and in particular, to an organic light-emitting display panel and a display apparatus.

Organic light-emitting displays are increasingly widely used in fields such as mobile communications and wearable products, so that research on the organic light-emitting displays becomes a hot topic. The organic light-emitting display includes laminated electrode layers such as a metal layer. Therefore, if the organic light-emitting display is directly exposed to ambient light, strong reflection of the ambient light on the electrode layers such as the metal layer causes a decrease in a contrast of the organic light-emitting display, and even causes a failure in observing a displayed image.

In the conventional technologies, to resolve an impact of the light reflection on the contrast of the organic light-emitting display, a polarizer is disposed on an out-light surface of the organic light-emitting display. Because the polarizer can absorb light in one polarization direction and allow light in only another polarization direction to pass through, the polarizer can prevent a part of the ambient light from being transmitted to an internal film layer of the organic light-emitting display, thereby implementing effect of reducing reflected light. However, the polarizer disposed on the out-light surface of the organic light-emitting display not only absorbs the ambient light, but also absorbs light that is emitted by a light-emitting device in the organic light-emitting display and that is used for display. As a result, luminous efficacy of the organic light-emitting display is reduced, and consequently, luminance of the organic light-emitting display is reduced, or a service life of the light-emitting device in the organic light-emitting display is shortened.

This application provides an organic light-emitting display panel and a display apparatus, to resolve the foregoing problems.

According to a first aspect, this application provides an organic light-emitting display panel, including a first substrate. A functional layer is disposed on the first substrate. The functional layer includes an emissive layer and an optical filter layer. The optical filter layer is disposed on a side that is of the emissive layer and that is close to an out-light surface of the organic light-emitting display panel. The emissive layer includes a plurality of organic light-emitting units and a pixel define layer. The pixel define layer is disposed between adjacent organic light-emitting units. The optical filter layer includes a plurality of color-blocking blocks and a plurality of black light-shielding blocks. The black light-shielding blocks and the color-blocking blocks are alternately arranged. The color-blocking blocks and the organic light-emitting units are disposed in a one-to-one correspondence manner. A region between disposed adjacent black light-shielding blocks covers the organic light-emitting unit in a thickness direction of the organic light-emitting display panel. The pixel define layer is a black light-absorbing layer. In the organic light-emitting display panel provided in this embodiment of this application, the black light-shielding blocks are disposed above the organic light-emitting layer, and the color-blocking blocks are disposed above the organic light-emitting units. In this way, the black light-shielding blocks and the color-blocking blocks may cooperate to allow transmission of only visible light with a specified wavelength from an external environment to an internal film layer of the organic light-emitting display panel, that is, to reduce transmission of visible light from the external environment to the internal film layer of the organic light-emitting display panel. Therefore, a reflectivity of the organic light-emitting display panel to external ambient light is reduced, and a contrast of the organic light-emitting display panel is improved. In addition, because the color-blocking blocks are used to filter the external ambient light, and the color-blocking block may allow light emitted by a corresponding organic light-emitting unit to pass through, luminance of the organic light-emitting display panel is not reduced.

In an implementation of the first aspect, the pixel define layer and the black light-shielding blocks are infrared-transparent black light-absorbing layers. The pixel define layer and the black light-shielding blocks are disposed as the infrared-transparent black light-absorbing layer, so that the visible light from the external environment can be prevented from being transmitted to the organic light-emitting display panel, thereby reducing reflection of the external ambient light on the organic light-emitting display panel. In addition, due to allowance for infrared light to pass through, it can be ensured that the organic light-emitting display panel can collect an optical image through emitting or receiving infrared light.

In an implementation of the first aspect, the organic light-emitting display panel further includes a drive circuit layer and a planarization layer. The planarization layer is disposed between the drive circuit layer and the emissive layer. The drive circuit layer includes a plurality of transistor structures. The planarization layer is a black light-absorbing layer. The planarization layer is also disposed as the black light-absorbing layer, to further reduce a probability that the visible light from the external environment is transmitted to the internal film layer of the organic light-emitting display panel and is reflected, thereby further improving resolution of the organic light-emitting display panel.

In an implementation of the first aspect, the planarization layer is an infrared-transparent black light-absorbing layer. The planarization layer is also disposed as the infrared-transparent black light-absorbing layer. In this way, it can also be ensured that infrared light can pass through the organic light-emitting display panel, and it can be ensured that the organic light-emitting display panel can collect an optical image through emitting or receiving infrared light.

In an implementation of the first aspect, the pixel define layer under the black light-shielding blocks is a discontinuous structure in the thickness direction of the organic light-emitting display panel. When the pixel define layer is not disposed at at least some locations under the black light-shielding blocks, transmittance for detect light such as infrared light is increased, to improve precision of collecting an optical image. In addition, because there are the black light-shielding blocks at the at least some locations, transmission and reflection of the external ambient light can still be effectively reduced.

In an implementation of the first aspect, in a plane perpendicular to the thickness direction of the organic light-emitting display panel, a minimum distance between an edge of the organic light-emitting unit and an edge of the corresponding region between adjacent black light-shielding blocks is a first distance, and the first distance is greater than 0.5 μm. In an implementation of the first aspect, the plurality of organic light-emitting units include a green organic light-emitting unit, a blue organic light-emitting unit, and a red organic light-emitting unit. The first distance corresponding to the green organic light-emitting unit is 3 μm, the first distance corresponding to the blue organic light-emitting unit is 1.5 μm, and the first distance corresponding to the red organic light-emitting unit is 5 μm. Matching is properly performed among the first distances respectively corresponding to the green organic light-emitting unit, the blue organic light-emitting unit, and the red organic light-emitting unit, so that luminance consistency of subpixels with different colors at a same viewing angle can be improved, thereby avoiding a color cast problem. In addition, in this embodiment of this application, because the black light-absorbing pixel define layer is used, when the first distance is properly increased, a relatively small reflectivity of the organic light-emitting display panel to the external ambient light can still be ensured.

In an implementation of the first aspect, the plurality of organic light-emitting units include a green organic light-emitting unit, a blue organic light-emitting unit, and a red organic light-emitting unit; and the plurality of color-blocking blocks include a green color-blocking block, a blue color-blocking block, and a red color-blocking block. The green organic light-emitting unit is disposed in a correspondence with the green color-blocking block, the blue organic light-emitting unit is disposed in a correspondence with the blue color-blocking block, and the red organic light-emitting unit is disposed in a correspondence with the red color-blocking block. A full width at half maximum of an optical spectrum of the green color-blocking block is less than or equal to 70 nm, a full width at half maximum of an optical spectrum of the blue color-blocking block is greater than or equal to 60 nm and less than or equal to 100 nm, and a full width at half maximum corresponding to a short wavelength of an optical spectrum of the red color-blocking block is less than or equal to 25 nm. Wavelength ranges of light allowed to pass through the green color-blocking block and the red color-blocking block are narrowed, so that intensity of the external ambient light reaching an anode in a light-emitting device through the green color-blocking block and the red color-blocking block is reduced. In this way, reflection of the external ambient light on the organic light-emitting display panel can be effectively reduced, and chrominance of red light and green light emitted by the organic light-emitting display panel can be improved. The full width at half maximum of the blue color-blocking block is widened, so that transmittance of the blue color-blocking block can be improved. In this way, luminance of a blue subpixel can be properly improved, and a service life of the blue subpixel can be further prolonged.

In an implementation of the first aspect, the organic light-emitting display panel further includes an encapsulation layer, a first planarization layer, a second planarization layer, and a coating planarization layer. The encapsulation layer is disposed between the emissive layer and the first planarization layer, and includes a first inorganic insulation layer, an organic insulation layer, and a second inorganic insulation layer. The organic insulation layer is disposed between the first inorganic insulation layer and the second inorganic insulation layer. The second inorganic insulation layer is disposed on a side that is of the organic insulation layer and that is close to the first planarization layer. At least one of the color-blocking block and the black light-shielding block is located between the first planarization layer and the second planarization layer. The second planarization layer is disposed on a side that is of the first planarization layer and that is close to the coating planarization layer. A refractive index of the second inorganic insulation layer, a refractive index of the first planarization layer, a refractive index of the second planarization layer, and a refractive index of the coating planarization layer sequentially decrease. Matching may be performed among refractive indexes of the optical filter layer, the encapsulation layer, and the coating planarization layer, so that the reflectivity of the organic light-emitting display panel to the external ambient light can be reduced and luminous efficacy for displayed light of the organic light-emitting display panel can be improved.

In an implementation of the first aspect, the refractive index of the second inorganic insulation layer is 1.8, the refractive index of the first planarization layer is 1.62, the refractive index of the second planarization layer is 1.55, and the refractive index of the coating planarization layer is 1.52. After matching is performed among the refractive indexes of the optical filter layer, the encapsulation layer, and the coating planarization layer based on the foregoing values of the refractive indexes, a contribution of the optical filter layer to the reflectivity of the organic light-emitting display panel to the external ambient light is approximately reduced to 0.2%. In this way, the reflection of the external ambient light on the organic light-emitting display panel is further reduced.

According to a second aspect, this application provides a display apparatus, including the organic light-emitting display panel provided in the first aspect. In the display apparatus provided in this embodiment of this application, black light-shielding blocks are disposed above an organic light-emitting layer, and color-blocking blocks are disposed above organic light-emitting units. In this way, the black light-shielding blocks and the color-blocking blocks may cooperate to allow transmission of only visible light with a specified wavelength from an external environment to an internal film layer of the organic light-emitting display panel, that is, to reduce transmission of visible light from the external environment to the internal film layer of the organic light-emitting display panel. Therefore, a reflectivity of the organic light-emitting display panel to external ambient light is reduced, and a contrast of the display apparatus is improved. In addition, because the color-blocking blocks are used to filter the external ambient light, and the color-blocking block may allow light emitted by a corresponding organic light-emitting unit to pass through, luminance of the display apparatus is not reduced.

Terms used in embodiments of this application are merely used to explain specific embodiments of this application, but are not intended to limit this application.

Embodiments of this application provide an organic light-emitting display panel and a display apparatus.

is a schematic diagram of an organic light-emitting display panel according to an embodiment of this application. As shown in, the organic light-emitting display panel provided in this embodiment of this application includes a first substrateand a second substrate. The first substrateand the second substrateare disposed opposite to each other. A functional layer is disposed on a side that is of the first substrateand that faces the second substrate. A surface coating planarization layeris disposed between the functional layer and the second substrate. The first substrateis configured to bear the functional layer. The second substrateis configured to encapsulate and protect the functional layer.

The functional layer disposed on the first substrateincludes a drive circuit layer, an emissive layer, and an optical filter layer. The drive circuit layer, the emissive layer, and the optical filter layerare sequentially disposed in a direction from the first substrateto the second substrate.

The emissive layerincludes a plurality of light-emitting devices. The plurality of light-emitting devices are in a one-to-one correspondence with subpixels on the organic light-emitting display panel. The light-emitting devices may be specifically organic light-emitting devices, and are configured to emit light for display. The drive circuit layerincludes a plurality of transistor structures. At least two transistor structuresmay form a pixel driver circuit. At least one transistor structurein the pixel driver circuit is electrically connected to the light-emitting device. The pixel driver circuit may provide a voltage or a current that is required for light emission performed by the light-emitting device at the emissive layer. The optical filter layermay be configured to: filter light emitted by the light-emitting device at the emissive layerto implement color display, and block light between adjacent subpixels to avoid optical crosstalk between different subpixels.

In addition, a buffer layermay be included between the drive circuit layerand the first substrate. The buffer layermay protect a semiconductor layer in the transistor structurefrom being damaged by external vapor, oxygen, and the like. A planarization layermay be disposed between the emissive layerand the drive circuit layer. The planarization layercovers the drive circuit layer, and provides a flat surface for preparing the emissive layer. An encapsulation layermay be disposed between the optical filter layerand the emissive layer. The encapsulation layermay protect an organic light-emitting material in the emissive layerfrom being damaged by water vapor, oxygen, and the like. In addition, the encapsulation layermay specifically include a first inorganic insulation layer, an organic insulation layer, and a second inorganic insulation layerthat are sequentially laminated in a thickness direction of the organic light-emitting display panel.

In this embodiment of this application, the optical filter layerand the emissive layerare both disposed on the first substrate. In this case, after different colors of light emitted by different light-emitting devices pass through the optical filter layer, purity of different colors of light can be improved. In addition, when external ambient light is to be transmitted to the drive circuit layerand the emissive layerthat includes a conducting layer containing a relatively large amount of metal, the external ambient light also needs to pass through the optical filter layer. In this case, the optical filter layermay block visible light from an external environment to avoid transmission of the visible light to a region between adjacent subpixels. In addition, the optical filter layermay allow transmission of only visible light with a specified wavelength from the external environment to a region in which a subpixel is located. Therefore, light transmitted to the organic light-emitting display panel is reduced, and reflection of the external ambient light on the display panel.

An aperture ratio of a small-sized top-emission organic light-emitting display panel is relatively small and approximately ranges from 15% to 20%. To reduce transmission of the visible light from the external environment to the organic light-emitting display panel without weakening display light emitted by the light-emitting device, in this embodiment of this application, a polarizer in the conventional technologies is replaced with the optical filter layerin the organic light-emitting display panel, to prevent external ambient light with some wavelengths from being transmitted to the organic light-emitting display panel. The polarizer is replaced with the optical filter layer, thereby avoiding a problem that luminance of light emitted by the organic light-emitting display panel is reduced due to use of the polarizer. In addition, the following case can be avoided: The external ambient light is transmitted to the organic light-emitting display panel and is reflected by the organic light-emitting display panel.

Still with reference to, in the thickness direction of the organic light-emitting display panel, the emissive layerspecifically includes an organic light-emitting layer, a first electrode layer, a second electrode layer, and a pixel define layer.

The organic light-emitting layerincludes a plurality of organic light-emitting units. The organic light-emitting unit is made of an organic light-emitting material. Different organic light-emitting units correspond to different subpixels. A film layer configured to emit light in the light-emitting device is specifically an organic light-emitting unit. The plurality of organic light-emitting units include a green organic light-emitting unit, a blue organic light-emitting unit, and a red organic light-emitting unit. Organic light-emitting units corresponding to different colors of emitted light are made of different organic light-emitting materials, and can emit different colors of light.

In an implementation of this application, the first electrode layermay be made of a metal material and disposed on a side that is of the organic light-emitting layerand that is close to the first substrate. The first electrode layerincludes a plurality of electrically insulated anodes. Different organic light-emitting units correspond to different anodes. The second electrode layermay be made of a transparent conducting material and disposed on a side that is of the organic light-emitting layerand that is close to the second substrate. The second electrode layerincludes cathodes. Cathodes of different subpixels may be electrically connected to each other to form a front-side structure. In one subpixel, in the thickness direction of the organic light-emitting display panel, the light-emitting device includes an anode, an organic light-emitting unit, and a cathode that are laminated, and the pixel drive circuit may be specifically electrically connected to the anode. Anodes in light-emitting devices corresponding to different subpixels are electrically insulated.

Still with reference to, the pixel define layeris disposed between adjacent organic light-emitting units. As shown in, the pixel define layeris included between the green organic light-emitting unitand the blue organic light-emitting unitthat are adjacent to each other, and the pixel define layeris also included between the blue organic light-emitting unitand the red organic light-emitting unitthat are adjacent to each other.

Still with reference to, the optical filter layerincludes a plurality of color-blocking blocksand a black light-shielding matrix. The black light-shielding matrix includes a plurality of black light-shielding blocks, to selectively filter light with different wavelengths that passes through the optical filter layer. At the optical filter layer, in addition to a location of a through hole that passes through the optical filter layer, the black light-shielding blocksand the color-blocking blocksare alternately arranged.

Regions between adjacent black light-shielding blocksare disposed in a one-to-one correspondence with a plurality of subpixels of the organic light-emitting display panel. The region between adjacent black light-shielding blockscorresponds to a subpixel region of the organic light-emitting display panel. The black light-shielding blocksin the black light-shielding matrix may prevent visible light from passing through, thereby avoiding optical crosstalk between adjacent subpixels.

The color-blocking blocksare disposed in a one-to-one correspondence with the organic light-emitting units. The color-blocking blockis disposed on a side that is of the corresponding organic light-emitting unit and that is close to an out-light surface of the organic light-emitting display panel. Different subpixels correspond to different color-blocking blocks. For one subpixel, an organic light-emitting unit may independently emit light, and the light emitted by the organic light-emitting unit is transmitted to the outside after passing through a corresponding color-blocking block.

The plurality of color-blocking blocksinclude a green color-blocking blockdisposed in a correspondence with the green organic light-emitting unit, a blue color-blocking blockdisposed in a correspondence with the blue organic light-emitting unit, and a red color-blocking blockdisposed in a correspondence with the red organic light-emitting unit. Therefore, the green color-blocking blockmay filter green light emitted by a light-emitting device corresponding to the green organic light-emitting unit, so that green light emitted by a green subpixel has purer chrominance; the blue color-blocking blockmay filter blue light emitted by a light-emitting device corresponding to the blue organic light-emitting unit, so that blue light emitted by a blue subpixel has purer chrominance; and the red color-blocking blockmay filter red light emitted by a light-emitting device corresponding to the red organic light-emitting unit, so that red light emitted by a red subpixel has purer chrominance.

is a schematic diagram of light reflection on an organic light-emitting display panel according to an embodiment of this application. When a polarizer is replaced with the optical filter layerin the organic light-emitting display panel to reduce visible light transmitted to the organic light-emitting display panel and further reduce reflection of ambient light on the organic light-emitting display panel, a reflectivity of the organic light-emitting display panel to the ambient light may reach a level less than or equal to 6%. Specifically, as shown in, an interfacial reflectivity between the second substrateand the air is a first reflectivity R1, where R1 is approximately 4%; an interfacial reflectivity between the optical filter layerand the coating planarization layeris a second reflectivity R2, where R2 is approximately 0.3%; and a reflectivity of the light-emitting device is a third reflectivity R3, where R3 is approximately 1.5%. It should be noted that the third reflectivity R3 is mainly contributed by the anode made of the metal material in the light-emitting device, and a conducting metal structure of the transistor structurein the drive circuit layerand a metal wire electrically connected to the transistor structureare usually disposed under a shielding partof the black matrix layerwith a sufficiently high light density and therefore basically does not reflect the ambient light.

Due to limitation of process precision, there is a size deviation between a design phase and a preparation process for the black light-shielding blockand the color-blocking block. As a result, there is an alignment deviation among a region between adjacent black light-shielding blocks, the color-blocking block, and the corresponding organic light-emitting unit//. When a size of the region between adjacent black light-shielding blocks, a size of the color-blocking block//, and a size of the corresponding organic light-emitting unit//are equivalent in a design phase, in a preparation process, the following risk exists: An edge of the black light-shielding blockand an edge of the color-blocking block//are indented relative to an edge of the organic light-emitting unit//. Although the third reflectivity R3 can be reduced in this case, the aperture ratio of the organic light-emitting display panel is reduced, thereby further reducing display luminance or increasing power consumption and shortening a service life of the organic light-emitting unit. Therefore, to ensure the aperture ratio, the size of the region between black light-shielding blocksand the size of the color-blocking block//may be designed to be greater than the size of the organic light-emitting unit//

In this embodiment of this application, the pixel define layeris a black light-absorbing layer. In other words, the pixel define layeris made of a material that absorbs visible light. In this embodiment of this application, the optical filter layermay be used to alleviate a light reflection phenomenon caused when the external ambient light is transmitted to the organic light-emitting display panel. However, because the black light-shielding blockscan block only external ambient light transmitted from an upper side of the black light-shielding blocks, there is still external ambient light passing through the optical filter layerin a region other than the black light-shielding blocksin the organic light-emitting display panel. The black light-absorbing pixel define layeris disposed to further reduce transmission of the external ambient light to the internal film layer of the organic light-emitting display panel and is further reflected.

Still with reference to, in one subpixel, an area of the region between adjacent black light-shielding blocksand an area of the color-blocking blockare actually greater than an area of the organic light-emitting unit//. Because light emitted by the organic light-emitting unit//has a specific angle, to ensure the aperture ratio of the organic light-emitting display panel, the area of the region between adjacent black light-shielding blocksand the area of the color-blocking block//are greater than the area of the organic light-emitting unit//corresponding to the subpixel, that is, an area of the subpixel. In this case, in the thickness direction of the organic light-emitting display panel, the region between adjacent black light-shielding blockscovers the corresponding organic light-emitting unit//. Because the area of the color-blocking block//is greater than the area of the organic light-emitting unit//corresponding to the color-blocking block//, and visible light with a specific wavelength still passes through after the external ambient light is filtered by the color-blocking block//, the emissive layerand the pixel define layerare disposed under the color-blocking block//in the thickness direction of the organic light-emitting display panel. The black light-absorbing pixel define layeris disposed in another region other than the light-emitting device. In this case, the pixel define layercan prevent the external ambient light passing through the color-blocking block//from being transmitted to another film layer under the pixel define layer, thereby reducing light reflection on the another film layer.

As shown in, an area of the anode included in the first electrode layerand an area of the cathode included in the second electrode layerare both greater than the area of the organic light-emitting unit//located between the anode and the cathode, to ensure that a light-emitting area of the organic light-emitting unit is maximized. In this case, in addition to a part disposed under the organic light-emitting unit//, the anode prepared by using metal further includes a part disposed outside a region in which the organic light-emitting unit//is located. The pixel define layerfurther covers the part that is of the anode and that is disposed outside the region in which the organic light-emitting unit//is located, so that the external ambient light passing through the color-blocking block//can be prevented from being transmitted to the anode outside the region in which the organic light-emitting unit//is located, thereby reducing light reflection on the anode. In other words, in this embodiment of this application, the light reflectivity of the organic light-emitting display panel to the external ambient light can be reduced through reducing the third reflectivity R3.

is a schematic diagram of another organic light-emitting display panel according to an embodiment of this application.is a schematic diagram of still another organic light-emitting display panel according to an embodiment of this application.

A difference between the organic light-emitting display panel shown inand the organic light-emitting display panel shown inandis that the color-blocking blocksin the organic light-emitting display panel shown inandare filled between adjacent black light-shielding blocks, and the organic light-emitting display panel shown infurther includes a first planarization layerand a second planarization layer. As shown in, in the thickness direction of the organic light-emitting display panel, the first planarization layeris disposed on a side that is of the optical filter layerand that is close to the encapsulation layer, and the second planarization layeris disposed between the color-blocking blocksand the black light-shielding blocks. That the black light-shielding blocksand the color-blocking blocksare alternately arranged specifically indicates that projections of the plurality of black light-shielding blocksin the thickness direction of the organic light-emitting display panel and projections of the plurality of color-blocking blocksin the thickness direction of the organic light-emitting display panel are alternately arranged. In this embodiment of this application, the optical filter layeris disposed between the encapsulation layerand the coating planarization layer. Matching may be performed among refractive indexes of the optical filter layer, the encapsulation layer, and the coating planarization layer, so that the reflectivity of the organic light-emitting display panel to the external ambient light can be reduced and luminous efficacy for displayed light of the organic light-emitting display panel can be improved.

Specifically, in the encapsulation layer, the second inorganic insulation layeris close to the optical filter layer. In this case, in a direction from the emissive layerin the organic light-emitting display panel to the out-light surface of the organic light-emitting display panel, the second inorganic insulation layer, the first planarization layer, the second planarization layer, and the coating planarization layerare sequentially disposed, and refractive indexes of these layers sequentially decrease. Specifically, the refractive index of the second inorganic insulation layermay be approximately 1.8, the refractive index of the first planarization layermay be approximately 1.62, the refractive index of the second planarization layermay be approximately 1.55, and the refractive index of the coating planarization layermay be approximately 1.52. In addition, a refractive index of the second substratemay be approximately 1.52.

It should be noted that, in this embodiment of this application, the refractive indexes of the second inorganic insulation layer, the first planarization layer, the second planarization layer, the coating planarization layer, and the second substratemay be close to the foregoing values of the refractive indexes. There may be specifically a relatively small deviation. For example, the refractive index of the first planarization layermay be 1.62±0.05, and the refractive index of the second planarization layermay be 1.55±0.05.

In addition, a main function of the color-blocking blockin the optical filter layeris to filter light passing through the color-blocking block. Therefore, a material included in the color-blocking blockis relatively fixed. A refractive index of the green color-blocking blockis approximately 1.61, a refractive index of the blue color-blocking blockis approximately 1.54, and a refractive index of the red color-blocking blockis approximately 1.67. In addition, a refractive index of the black light-shielding blockmay be set to 1.52±0.03.

The inventor learns through experiments that, in the organic light-emitting display panel provided in this embodiment of this application, if matching is not performed among the refractive indexes of the optical filter layer, the encapsulation layer, and the coating planarization layer, a change in the refractive index at a location of the optical filter layermay have a contribution of approximately 0.5% to the reflectivity of the organic light-emitting display panel to the external ambient light. After matching is performed among the refractive indexes of the optical filter layer, the encapsulation layer, and the coating planarization layerbased on the foregoing values of the refractive indexes, a contribution of the optical filter layerto the reflectivity of the organic light-emitting display panel to the external ambient light is approximately reduced to 0.2%. In this way, the reflection of the external ambient light on the organic light-emitting display panel is further reduced.

In another implementation of this embodiment, as shown in, the second planarization layermay be alternatively disposed on a side that is of the optical filter layerand that is close to the coating planarization layer. In other words, the color-blocking blocksand the black light-shielding blocksare disposed between the first planarization layerand the second planarization layer.

Still with reference toand, in an embodiment of this application, the second planarization layermay have a haze from 1% to 3%. Particle doping may be performed on the second planarization layer, so that the second planarization layerhas a specific haze. Specifically, a thickness of the second planarization layerranges from 2 μm to 3 μm. Doped particles may be specifically small inorganic particles, polymer beads, small polymer particles obtained through photopolymerization, or the like. A size of the doped particle ranges from 500 nm to 800 nm. The haze of the second planarization layeris set to 1% to 3%, so that a diffraction phenomenon caused due to the reflection of the external ambient light on the organic light-emitting display panel can be eliminated. In this way, the following case is avoided: A bright spot appears when the organic light-emitting display panel performs display, thereby affecting viewing experience and definition.

is a schematic diagram of a relationship between a reflectivity of an organic light-emitting display panel and an extended distance of a region between adjacent black light-shielding blocks. In, the extended distance, indicated by a horizontal coordinate, of the region between adjacent black light-shielding blocks is an extended distance of the region between adjacent black light-shielding blocksrelative to the corresponding organic light-emitting unit//, that is, an extended distance of the part that is of the color-blocking blockand that is located between adjacent black light-shielding blocksrelative to the corresponding organic light-emitting unit; and the reflectivity indicated by a vertical coordinate is the reflectivity of the organic light-emitting display panel to the external ambient light. It can be learned fromthat, when the black light-absorbing pixel define layerin the organic light-emitting display panel provided in this embodiment of this application is replaced with a conventional pixel define layer, in comparison with an organic light-emitting display panel including the pixel define layerwith a light density of 30%, the organic light-emitting display panel including the conventional pixel define layer has an apparent problem of an increased reflectivity of the organic light-emitting display panel due to an increase of the extended distance of the region between adjacent black light-shielding blocks. In other words, when the optical filter layeris disposed on the first substrateand an area of the part that is of the color-blocking blockand that is located between adjacent black light-shielding blocksis greater than the area of the corresponding organic light-emitting unit//, the organic light-emitting display panel includes the black light-absorbing pixel define layer, so that the reflection of the organic light-emitting display panel to the external ambient light can be apparently reduced.

In addition, it can also be learned fromthat, when the reflectivities to the external ambient light are consistent, in comparison with the organic light-emitting display panel including the conventional pixel define layer, the extended distance of the region between adjacent black light-shielding blocksmay be set to relatively large in the organic light-emitting display panel including the pixel define layerin this application. Therefore, when the reflectivity of the organic light-emitting display panel to the external ambient light falls within a specific range, room for adjusting the region between adjacent black light-shielding blocksin the organic light-emitting display panel provided in this embodiment of this application is enlarged, so that larger room for operations is provided for adjusting matching shapes of different colors of subpixels based on a shape of the region between adjacent black light-shielding blocksand shapes of the color-blocking blockslocated between adjacent black light-shielding blocks, thereby further improving a color cast problem.

is a schematic plane view of organic light-emitting units and color-blocking blocks between adjacent black light-shielding blocks according to an embodiment of this application. In a plane perpendicular to the thickness direction of the organic light-emitting display panel, a minimum distance between an edge of the organic light-emitting unit//and an edge of the corresponding region between adjacent black light-shielding blocksis a first distance d. As shown in, a distance between the edge of the corresponding organic light-emitting unit//and an edge of the part that is of the color-blocking block//and that is located between adjacent black light-shielding blocksis the first distance d, and d is greater than 0.5 μm. The part that is of the color-blocking block//and that is located between adjacent black light-shielding blocksis extended by more than 0.5 μm relative to the corresponding organic light-emitting unit//, so that transmittance of the organic light-emitting display panel can be increased. In addition, the black light-absorbing pixel define layerin this application is used, thereby avoiding a problem of an increased reflectivity of the anode to external light due to extension of the region between adjacent black light-shielding blocks.

is a schematic diagram of a relationship between a viewing angle and luminance of an organic light-emitting display panel in a subpixel arrangement manner shown in.is a schematic diagram of another relationship between a viewing angle and luminance of an organic light-emitting display panel in a subpixel arrangement manner shown in. Inand, the viewing angle indicated by a horizontal coordinate indicates different viewing angles at which a human eye watches the organic light-emitting display panel, and the luminance indicated by a vertical coordinate is luminance of light emission of the organic light-emitting display panel.

The tested organic light-emitting display panel inis an organic light-emitting display panel that includes a conventional pixel define layer and in which the region, corresponding to each subpixel, between adjacent black light-shielding blocksis extended by 3 μm. In other words, the first distance d corresponding to the region between adjacent black light-shielding blocksis equal to 3 μm. The tested organic light-emitting display panel inis an organic light-emitting display panel that includes the black light-absorbing pixel define layerin this application and in which the region, corresponding to each subpixel, between adjacent black light-shielding blocksis extended by 3 μm. In other words, the first distance d corresponding to the region between adjacent black light-shielding blocksis equal to 3 μm. When the conventional pixel define layer is used, it can be learned fromthat luminance of a red subpixel decreases obviously as the viewing angle increases. Consequently, a color cast problem occurs at a large viewing angle. However, after the black light-absorbing pixel define layeris used, in comparison with, in, a decrease amplitude of luminance of a red subpixel tends to be close to that of another color of subpixel as the viewing angle increases. Therefore, a color cast problem can be improved.

is another schematic plane view of organic light-emitting units and color-blocking blocks between adjacent black light-shielding blocks according to an embodiment of this application.is a schematic diagram of a relationship between a viewing angle and luminance of an organic light-emitting display panel in a subpixel arrangement manner shown in. A difference between the embodiment shown inand the embodiment shown inis that the part that is of the color-blocking blockand that is located between adjacent black light-shielding blocksis designed with rounded corners. In other words, the region between adjacent black light-shielding blocksis designed with rounded corners.